olmsted



T0 ALL WHOM IT MAY CONCERN:

Quitar @tutes latimt @fitta L. H. OLMS'IED, OF STMFORD, C ONNECTIGUT.Leiters Patent IVO. 66,8'1'9, dated July 1G, 1867.

IMPROVEMENT IN DROB-HAMMLRS.

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Bc it known that I, L. II. OLMSTl-ID, of Stamford, in the county ofFairtield, and State of Connecticut, have invented a new and improvedDrop-Press; and I do hereby declare that thc following is a full, clear,and exact description thereof, which will enable those skilled in theart to make and use the sume, reference being had to the accompanyingdrawings, forming part of this specification, in which- Figure l is afront view of my invention.

Figure f2, a side view of the same.

Figure 3, a horizontal section of the same, taken in the line :v fr,tig. 1.

Figure 4, a vertical section of a portion of the same, taken in the liney y, fig. l; and

Figure 5, a plan or top view or" the same, with the driving-pulley insection.

Similar letters of reference indicate corresponding parts.

This invention relates to a new and improved drop-press for swaging,punching, and like purposes, and it consists of a novel automaticmechanism, as hereinafter` fully shown and described, whereby thedriving-pulley .of the machine may be operated continuously, and therising and falling weight placed under thc complete control ci' theoperator.

A represents a. base-block,I to which two uprights, B B, are attached,said uprights being of a suitable height, and connected at their upperends by a cross-bar, C, as shown clearly in fig. 1. On each end ofthecross-bar C there is an ear or lufT a, and these ears or lugs serve asbearings for a horizontal shaft, D, having a pulley, 5,

open with a strap, E, attached, the letter having weight, F, at its end.The weight F is allowed to rise and4 fall freely between the uprights BB, which serve as guides for the same, the weight having verticalgrooves c c made in ifto receive the uprights, as shown clearly in fig.3. On the shaft D there is also keyed a ratchet, G, with which a pawl,H, engages, said pawl being pivot-ed to one of the ears or lugs, a, andhaving a cord, el, attached to its outer end, which may extend down to atreadle on the flooring on which the base-block A rests. I is adriving-pulley, placed loosely on the shaft D at one end of This pulleyis hollow, or of shell form, (sec figs. 2, 4, and 5,) and its inner sidehas two horizontal concentric anges, c e, which form au .annular groeve,f, to receive a pin, g, which is of oval form in its transverse section,as shown in g. 4. This pin g is constructed with ajournal, i, whichpasses through an arm, t, attached to the shaft D, and the outer end ofsaidjournal is; connected to an arm, j, which has a set-screw, 7c,passing through its outer end, the set-screw bearing against u. slidingror adjustable wedge, Z. This wedge Zis attached to a collar, m, which isfitted loosely on the shaft D, so that it may slide thereon, but it isconnected with the shaft by means of a 'feather and groove, so that itmay, turn with the shaft at all times. J is a vertical shaft, which isbythe side of one ofthe uprights B, and has its lower end stepped in thebase-block A, said shaft passing up .through the cross-bar C, whichserves as an upper bearing for it, and having au arm, n, projectinghorizontally from its upper end, the arm n being connected by a bar, K,with the sliding-collar m, to which thewedge Z is attached. The bar K isprovided with a pendent forli, o, to it in a groove madecircumferentially in the collar. This mode of connecting the bar K withthc collar m admits of the latter rotating with the shaft D, and at thesaine time allows the bar K to slide the collar. On this shaft J there`are two arms, L Lone, L, being at its lower, and the other, L', at itsupper end. The position of these arms on the sha-ft J is shown clearlyin fig. l.

The operation is as follows: The pulley I is turned with a continuousmotion, and the weight F is raised by the winding of the strap E on thepulley b whenever the pulley I is connected with the shaft D. rj hisconnection is formed by the pin g binding or wcdging itself between theflanges c c of the pulley I, which is donc by the wedge Zbeing forcedbetween the arms 'ij and turning the piu g in a radial position withpulley I, the wedge Z, when forced between said arms, moving the arm andconsequently the pin g, which is attached to said arm.. The wedge Zismoved, of course, withthe slidingcollar m, and the collar is moved bythe bai-.IQ attached to the arm 11 on the upper-*Vend of the shaft I. Asthe weight F reaches its highest point, it actuates the upper arm L onthe shaft J, turns said shafta-certain distance, and thereby actuatesthe bar K, so that the latter will move' the collar inail-d` draw outthe wedge Zfrom between the arms ij, and thereby free lthe pulley Ifromthe shaft D. The weight F would now fall by its own gravity were it notfor the pawl H engaging' with the ratchet G, and when the operatorwishes the weight to fall, he simply pulls the cord KZ, or actuatcs atieadle, to which said cord is attached, und thereby raises the powlHfrom the ratchet G, and the weight F descends, the weight as it reachesits lowest point striking thc lower arm L, :md thereby 'actuating theshaft J, so that the ber K will force the Wedge Z between the arms j andmove the-pin g, causing the lutter to bind between the Hongos e e, andforming e connection between the pulley I and shaft D, so that theweight F will again risc, and so on. l'. will be seen-that if nfrapidcontinuous rising and falling movement of the weight F is required, thepawl H is kept free from the ratchet G. It will, of course, beunderstood that the weight F und bese-block A have proper dies orpunches attached according to'the work to be performed.

I lo not claim the friction driving-pulley l, but I (lo claim as new,and desire to .secure by Letters Patent- 1. The combination of thefriction driving-pulley I and shaft D, with the devices for engaging unddisengaging the one from the other, consisting,` of the weight F, theupright shaft J provided with the arins L Lf, the bnr K, attached te enarm, 1L, on the upper end of seid shaft, end the, sliding-collar m, onshaft D, all arranged to operate in connection with a. friction-clutchpulley, substantieliy as set forth.

2. I further claim the retchetG and powl H, in combination with themechanism sct forth in first clause of claim, substnnticlly'as and forthe purpose specified.

L. H. OLMSTED.

Witnesses:

M. M. LIVINGSTON, ALEX. F. ROBERTS.

